Blac Chyna felt Kylie Jenner did not look after King Cairo during North West's birthday party(Getty)

Tyga's former fiancee Blac Chyna does not want American reality television star Kylie Jenner to spend time with their child.

According to a report in Radar Online, the 27-year-old model warned her former boyfriend to "keep Kylie away" from the couple's two-year-old son, King Cairo Stevenson.

Chyna was reportedly upset after she saw pictures of her son at Disneyland with the 17-year-old Keeping Up With The Kardashians star and her family during North West's birthday celebrations, and she looked uninterested in King Cairo.

"Blac told Tyga that she does not want her son to even be around Kylie, but there is nothing that she can really do to stop this," a source said.

"Tyga pretty much raises King Cairo and Blac Chyna is only a part-time mother," the insider added. "Kylie has taken on a role of second mother to King, but she is in no way prepared to handle the role."

"She does not know the first thing about being a mother because she really has had no good role model to learn how to be a mom," the source continued. "Kris was so absent for her entire life and the only thing that Kylie knows about how to take care of a kid is to buy their happiness and hire help."

Rumours that Tyga and Kim Kardashian's teenage half sister are dating started after they were spotted at Kabuki Japanese Restaurant in Los Angeles' Woodland Hills area, last year in October.

It was previously reported that the Kardashian clan are no longer keen on the relationship, as they believe that Tyga is a bad influence on Kylie.